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Eric Dumazet 42a387dc80 mac80211: mesh: fix mesh_pathtbl_init() error path [ Upstream commit `905b2032fa` ] If tbl_mpp can not be allocated, we call mesh_table_free(tbl_path) while tbl_path rhashtable has not yet been initialized, which causes panics. Simply factorize the rhashtable_init() call into mesh_table_alloc() WARNING: CPU: 1 PID: 8474 at kernel/workqueue.c:3040 __flush_work kernel/workqueue.c:3040 [inline] WARNING: CPU: 1 PID: 8474 at kernel/workqueue.c:3040 __cancel_work_timer+0x514/0x540 kernel/workqueue.c:3136 Modules linked in: CPU: 1 PID: 8474 Comm: syz-executor663 Not tainted 5.10.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__flush_work kernel/workqueue.c:3040 [inline] RIP: 0010:__cancel_work_timer+0x514/0x540 kernel/workqueue.c:3136 Code: 5d c3 e8 bf ae 29 00 0f 0b e9 f0 fd ff ff e8 b3 ae 29 00 0f 0b 43 80 3c 3e 00 0f 85 31 ff ff ff e9 34 ff ff ff e8 9c ae 29 00 <0f> 0b e9 dc fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 7d fd ff RSP: 0018:ffffc9000165f5a0 EFLAGS: 00010293 RAX: ffffffff814b7064 RBX: 0000000000000001 RCX: ffff888021c80000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888024039ca0 R08: dffffc0000000000 R09: fffffbfff1dd3e64 R10: fffffbfff1dd3e64 R11: 0000000000000000 R12: 1ffff920002cbebd R13: ffff888024039c88 R14: 1ffff11004807391 R15: dffffc0000000000 FS: 0000000001347880(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000140 CR3: 000000002cc0a000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rhashtable_free_and_destroy+0x25/0x9c0 lib/rhashtable.c:1137 mesh_table_free net/mac80211/mesh_pathtbl.c:69 [inline] mesh_pathtbl_init+0x287/0x2e0 net/mac80211/mesh_pathtbl.c:785 ieee80211_mesh_init_sdata+0x2ee/0x530 net/mac80211/mesh.c:1591 ieee80211_setup_sdata+0x733/0xc40 net/mac80211/iface.c:1569 ieee80211_if_add+0xd5c/0x1cd0 net/mac80211/iface.c:1987 ieee80211_add_iface+0x59/0x130 net/mac80211/cfg.c:125 rdev_add_virtual_intf net/wireless/rdev-ops.h:45 [inline] nl80211_new_interface+0x563/0xb40 net/wireless/nl80211.c:3855 genl_family_rcv_msg_doit net/netlink/genetlink.c:739 [inline] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0xe4e/0x1280 net/netlink/genetlink.c:800 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x780/0x930 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9a8/0xd40 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2353 ___sys_sendmsg net/socket.c:2407 [inline] __sys_sendmsg+0x2b1/0x360 net/socket.c:2440 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Fixes: `60854fd945` ("mac80211: mesh: convert path table to rhashtable") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Link: https://lore.kernel.org/r/20201204162428.2583119-1-eric.dumazet@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-12-29 13:46:45 +01:00
arch	x86/mm/mem_encrypt: Fix definition of PMD_FLAGS_DEC_WP	2020-12-29 13:46:44 +01:00
block	blk-cgroup: Pre-allocate tree node on blkg_conf_prep	2020-11-10 10:29:05 +01:00
certs	Replace magic for trusting the secondary keyring with #define	2018-09-09 19:55:54 +02:00
crypto	crypto: algif_skcipher - EBUSY on aio should be an error	2020-10-29 09:07:01 +01:00
Documentation	dt-bindings: net: correct interrupt flags in examples	2020-12-08 10:17:34 +01:00
drivers	net: stmmac: dwmac-meson8b: fix mask definition of the m250_sel mux	2020-12-29 13:46:45 +01:00
firmware	Fix built-in early-load Intel microcode alignment	2020-01-23 08:20:30 +01:00
fs	gfs2: check for empty rgrp tree in gfs2_ri_update	2020-12-11 13:39:06 +01:00
include	kbuild: avoid static_assert for genksyms	2020-12-29 13:46:44 +01:00
init	printk: reduce LOG_BUF_SHIFT range for H8300	2020-11-05 11:06:55 +01:00
ipc	ipc/util.c: sysvipc_find_ipc() incorrectly updates position index	2020-05-20 08:17:07 +02:00
kernel	tracing: Fix userstacktrace option for instances	2020-12-11 13:39:06 +01:00
lib	random32: make prandom_u32() output unpredictable	2020-11-18 18:28:00 +01:00
mm	mm/swapfile: do not sleep with a spin lock held	2020-12-11 13:39:05 +01:00
net	mac80211: mesh: fix mesh_pathtbl_init() error path	2020-12-29 13:46:45 +01:00
samples	misc: vop: add round_up(x,4) for vring_size to avoid kernel panic	2020-10-29 09:07:17 +01:00
scripts	scripts/setlocalversion: make git describe output more reliable	2020-11-05 11:06:51 +01:00
security	selinux: Fix error return code in sel_ib_pkey_sid_slow()	2020-11-18 18:27:58 +01:00
sound	ALSA: hda/generic: Add option to enforce preferred_dacs pairs	2020-12-11 13:39:05 +01:00
tools	x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes	2020-12-11 13:39:07 +01:00
usr	initramfs: restore default compression behavior	2020-04-13 10:34:19 +02:00
virt	KVM: fix overflow of zero page refcount with ksm running	2020-10-01 13:12:33 +02:00
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.get_maintainer.ignore
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.gitignore	kbuild: rpm-pkg: keep spec file until make mrproper	2018-02-13 10:19:46 +01:00
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS	MAINTAINERS: Update drm/i915 bug filing URL	2020-02-28 16:36:12 +01:00
Makefile	Linux 4.14.212	2020-12-11 13:39:07 +01:00
README

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.